Shock absorber for electric sewing-machine lights



Sept. 22, 1925. 1,554,787

D. H. CHASON SHOCK A'BSfGBBQR !OR ELECTRIC sswme MACHINE LIGHTS rum Apfll 18,1924

INVENTOR A ORNEY Patented Sept. 22, 1925.

, v I 1,554,7e7

DANIELE;- cIr'AEsoN, or ELIZABETH, NEW Jnnsnn-xssrenon 'rO 'D'HEE sINGnwrrAn-U- FAG'IURING COMPANY,- on ELIZABETH JERSEY.

r NEW JERSEY, A CORPORATION or SHOCK ABSORBER roa- ELncrrtr-o sEwrNe-n-Ac-nmn LIGHTS.

Application-filed April 18, 1924. SeriaLNo. ro /5,392.

To all whom it may ao 'i'cerm V Be it known that I, DA'NiEIj H. C'I IAsoN, a citizen of the Umted' States, residing at Elizabeth, in the county o'fUnion' and State of New Jersey, have invented certain new and useful Improvements in Shock Absorbcrs for Electric Sewing-Machine Lights, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to sewing machine lighting attachments of the type represented in the United States patent to B. Elshoff, No. 1,484,822, of February 26, 1924, and has for an object to provide a simplified form of shock absorber for a lighting attachment of this character which may be quickly and easily assembled and adjusted to meet working requirements.

To the ends in view a primary supportmg member, adapted to be secured to the sewing machine frame, has mounted thereon for circular adjustment axially of the lamp-socket a secondary support which is adapted to yieldingly or resiliently carry the lampsocket and associated parts. Use is preferably made of cushioning means the strength or resilience of which isvariable by circular adjustment of the lamp-socket relative to said secondary support. The present invention resides primarily in the provision for these two adjustments in combination, whereby the lamp-socket may be set with its switching and reflector elements in correct operative positions; the switch bearing a predetermined accessible relationship to the sewing machine frame and the reflector directing the light downwardly upon the work, regardless of the adjustment of the cushioning means. Simplicity of construction, aside from the double adjustment, is also a feature of the invention.

In the accompanying drawings, Fig. 1 is a plan view of the invention as applied to a sewing machine. Fig. 2 is a vertical section of the lamp-supporting means longitudinally of the lamp-socket. Fig. 3 is a section on the line 3-3, Fig. 2. Fig. 4 is a disassembled perspective view of the secondary supporting elements and associated parts.

In the embodiment of the invention illustrated, 1 represents the bed of a sewing machine having a standard 2 and overhanging arm 3 carrying the usual needle and presserbars 4; 5. The arm 3 is formedadja entthe standard 2witl'i abuse" 6 in'w'hicli'is disposed the reduced end 7 of t'lieprimaiysupporting ii 1. -i n M2" c element or hollow elbow 8 112LV1Ilg11tS othen end bored to afford the internal shoulder 9 against which is seated the secondary supporting member 10. The member 10 is preferably made up in the form of a ring having a central aperture 11 and peripheral groove 12 adapted to be entered by the diametrically opposed set-screws 13 in the member 8. Passing through the ring member 10 is the nipple 14 formed at one end with a head 15 and flange 16 notched at 17 to embrace the pin 18 fixed in the ring member 10. Screwed onto the threaded end of the nipple 14 is the lamp-socket 19. The hole 11 in the ring 10 may be bushed by means of cushioning washers 20, say of felt, and additional cushioning washers 21 are interposed between the opposite faces of the ring 10 and the flange 16 and socket 19, respectively; a metal washer 22 being preferably provided adjacent the socket 19 to press upon the cushioning washer adjacent thereto. The socket 19 is. of course, fixed to the nipple 14 by means of the set-screw 23.

The socket may be equipped with a pushswitch 24, which should stand Vertically, and with a lamp 25 and reflector 26, the lower half of which is open to direct the light downwardly upon the work.

As will be observed, adjustment of the socket 19 relative to the nipple 14 to increase or reduce the degree of compression of the cushioning washers 21 will alter the position of the socket switch 24 relative to the sewing machine frame. To compensate for this the set-screws 13 may be loosened and the secondary support 10 rotated until the switch 24 is in correct operative position.

The means described permit of fine adjust ment of the degree of cushioning of the shock-absorber to best meet operating con- 'ditions and the correct positioning of the lamp-socket switch relative to the sewing machine frame for any adjustment of the shock-absorber. The device is of simple construction and embodies a minimum number of parts which may be readily assembled into a compact whole.

Having thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine lighting attach ment, the combination with a tubular supporting member having an openfree end, of a supporting ring secured within such open end, a tubular nipple passing loosely through the aperture in such ring and having at one end a head, the diameter of which is greater than that of such aperture, a lampsocket secured to the other end of such nipple, and compressible cushioning means disposed between the opposite faces of said ring and said nipple and lamp-socket, said nipple being free to rock transversely of the axis of said supporting ring.

2. In a sewing machine lighting attachment, the combination with a primary supchine frame, of a secondary support in the form of a ring carried by and circularly adjustable relative to said primary support, a

headed nipple passing through said ring, a

socket carried by said nipple, means for preventing relative rotation between said nipple and ring, and cushioning means interposed between the opposite faces of said ring and the nipple-head and socket, respectively, said means being compressible -by relative rotation of said nipple and socket.

In testimony whereof, I have signed my name to this specification.

DANIEL H. OHASON. 

